Orange City, IA Radon Mitigation and Testing

Q: What EPA Radon Zone is Orange City in?

Orange City is in Sioux County, EPA Zone 1.

Q: How much does radon mitigation cost in Orange City?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Sioux County

EPA Zone 1

Located in Sioux County in northwestern Iowa, Orange City falls within EPA Zone 1 where the combination of Prairie Pothole glacial deposits and underlying limestone bedrock creates high radon potential. Although specific testing data for the 51041 zip code is not yet available, this region consistently ranks among Iowa's highest for residential radon concentrations. Homeowners should conduct testing immediately, as northwestern Iowa's geological conditions frequently produce readings well above EPA action levels.

Orange City, IA Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Orange City, IA Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Orange City Radon Facts

Key details about the radon risk profile for Orange City and the 51041 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Sioux County, IA

Zip Code

51041

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Orange City and the 51041 zip code are located in Sioux County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Orange City, IA

What EPA Radon Zone is Orange City in?

Orange City and the 51041 zip code are in Sioux County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

How much does radon mitigation cost in Orange City?

Radon mitigation in Orange City typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in Orange City?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.

Most Active Radon Markets in Iowa

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Waterloo	8.50 pCi/L	4
Ames	9.67 pCi/L	3
Fairfield	14.00 pCi/L	2
Mount Pleasant	12.00 pCi/L	2
Ottumwa	5.50 pCi/L	2
Iowa City	7.00 pCi/L	1
Muscatine	No submissions	0